diff options
| author |   Len Brown <len.brown@intel.com> | 2017-12-22 00:27:56 -0500 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2018-01-14 12:14:50 +0100 |
| commit | 4b5b2127238e689ee18aa6752959751dd61c4c73 (patch) | |
| tree | be8defe035a8f4ebc2c4c34910a348b9183ef220 /arch | |
| parent | x86/tsc: Fix erroneous TSC rate on Skylake Xeon (diff) | |
| download | linux-dev-4b5b2127238e689ee18aa6752959751dd61c4c73.tar.xz linux-dev-4b5b2127238e689ee18aa6752959751dd61c4c73.zip | |
x86/tsc: Print tsc_khz, when it differs from cpu_khz
If CPU and TSC frequency are the same the printout of the CPU frequency is
valid for the TSC as well:
tsc: Detected 2900.000 MHz processor
If the TSC frequency is different there is no information in dmesg. Add a
conditional printout:
tsc: Detected 2904.000 MHz TSC
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: peterz@infradead.org
Link: https://lkml.kernel.org/r/537b342debcd8e8aebc8d631015dcdf9f9ba8a26.1513920414.git.len.brown@intel.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/tsc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 3bf4df7f52d7..e169e85db434 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -1316,6 +1316,12 @@ void __init tsc_init(void) (unsigned long)cpu_khz / 1000, (unsigned long)cpu_khz % 1000); + if (cpu_khz != tsc_khz) { + pr_info("Detected %lu.%03lu MHz TSC", + (unsigned long)tsc_khz / 1000, + (unsigned long)tsc_khz % 1000); + } + /* Sanitize TSC ADJUST before cyc2ns gets initialized */ tsc_store_and_check_tsc_adjust(true); |